Are you certain of that? I had the impression that the relevant homeowners association or somesuch had actually designated him as some kind of watch organizer or contact point, distributed newsletters identifying him as such, etc. Maybe not "formal," and certainly not "Neighborhood Watch" with capital letters (since he intentionally violated several of their most important, well-considered guidelines on how to run a watch), but still something above and beyond just a guy acting on his own. Or am I mistaken? Wikipedia has an entire section on exactly this topic: http://en.wikipedia.org/wiki/Shooting_of_Trayvon_Martin#Zimmerman.27s_role_in_the_neighborhood_watch As the only person to volunteer when the homeowners association wanted to organize a community watch, Zimmerman was appointed coordinator by his neighbors, according to Wendy Dorival, Neighborhood Watch organizer for the Sanford Police Department. The homeowner's association told residents who saw suspicious activity to call Zimmerman if they could not contact the police.